Thought I'd share some pics of my battery build. Happy to hear any constructive criticism.
I modelled it off Andy's (Off Grid Garage) battery rack.
My old bank (~40kWh of lead acid that was now only good for about 8kWh)
Removing the old batteries (each cell weighs about 12kg)
New cells arrive
Made up some end plates from 8mm thick steel for compressing the cells.
I designed a laser cut panel to hold my BMS, active balancer and terminals
Cells in position ready to be be compressed a little
Wiring up balancer and BMS
Series connections installed (yes I should install dual wall heatshrink on the lugs, but I didn't have enough and that stuff is expensive.)
Mid-string class T fuse (I soon found that this added quite a lot of resistance and messed up my BMS voltage sense readings for cell 9 under heavy load, fortunately Seplos have an extra sense wire for cell 9- which I originally just connected up to cell 8+. Once I moved this over to the negative side of cell 9, my voltage readings came right).
I modelled it off Andy's (Off Grid Garage) battery rack.
My old bank (~40kWh of lead acid that was now only good for about 8kWh)
Removing the old batteries (each cell weighs about 12kg)
New cells arrive
Made up some end plates from 8mm thick steel for compressing the cells.
I designed a laser cut panel to hold my BMS, active balancer and terminals
Cells in position ready to be be compressed a little
Wiring up balancer and BMS
Series connections installed (yes I should install dual wall heatshrink on the lugs, but I didn't have enough and that stuff is expensive.)
Mid-string class T fuse (I soon found that this added quite a lot of resistance and messed up my BMS voltage sense readings for cell 9 under heavy load, fortunately Seplos have an extra sense wire for cell 9- which I originally just connected up to cell 8+. Once I moved this over to the negative side of cell 9, my voltage readings came right).